Integrate the Grok AI provider into the Fabric system for AI model interactions.
### CHANGES
* Add Grok AI client to the plugin registry.
* Include Grok AI API key in REST API configuration endpoints.
## CHANGES
- Add prompt strategies like Chain of Thought (CoT)
- Implement strategy selection with `--strategy` flag
- Improve README with platform-specific installation instructions
- Fix web interface documentation link
- Refactor git operations with new githelper package
- Add `--liststrategies` command to view available strategies
- Support applying strategies to system prompts
- Fix YouTube configuration check
- Improve error handling in session management
- Added LM Studio as a new plugin, now it can be used with Fabric.
- Updated the plugin registry with the new plugin name
- Updated the configuration with the required base url
- Add new template package to handle variable substitution with {{variable}} syntax
- Move substitution logic from patterns to centralized template system
- Update patterns.go to use template package for variable processing
- Support special {{input}} handling for pattern content
- Update chatter.go and rest API to pass input parameter
- Enable multiple passes to handle nested variables
- Report errors for missing required variables
This change sets up a foundation for future templating features like front matter
and plugin support while keeping the substitution logic centralized.
